Abstract : The possible scientific uses of a satellite radar system are evaluated and several experiments are discussed. Synoptic studies of field-aligned ionization associated with radio aurora, the detection of shower meteors, and further investigation of the ionospheric electron content with such a system appear to show considerable promise. The study of satellite precursors and wakes might also be accomplished by a satellite radar system employing a radar frequency in the neighborhood of 30 MHz. The same radar frequency would also be advantageous for the meteor and auroral investigations. In view of their significance in field-aligned ionization studies, the transverse propagation angle contours have been computed at specified latitudes along a given meridian. These contours are used to predict the radar beam orientations for which certain field-aligned phenomena might be observed. (Author)